hotspot/test/compiler/arraycopy/TestEliminatedArrayCopyPhi.java
author thartmann
Thu, 12 May 2016 08:23:25 +0200
changeset 38675 066fcb1eb80a
parent 32402 a20f90d1f364
child 40059 c2304140ed64
permissions -rw-r--r--
8155643: Java crash with assert in Xcomp mode and disabled ReduceInitialCardMarks Summary: We should not emit a subtype check for CloneOop arraycopy. Reviewed-by: kvn
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/*
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 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 8134321
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 * @summary Code that capture field values of eliminated allocation at a safepoint when there's an arraycopy behind a Phi is broken
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 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement TestEliminatedArrayCopyPhi
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 *
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 */
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public class TestEliminatedArrayCopyPhi {
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    static int[] escaped;
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    static void test(int[] src, boolean flag1, boolean flag2) {
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        int[] array = new int[10];
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        if (flag1) {
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            System.arraycopy(src, 0, array, 0, src.length);
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        } else {
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        }
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        if (flag2) {
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            // never taken
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            escaped = array;
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        }
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    }
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    public static void main(String[] args) {
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        int[] src = new int[10];
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        for (int i = 0; i < 20000; i++) {
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            test(src, (i % 2) == 0, false);
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        }
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    }
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}